<!--
 * @Date: 2021-08-19 21:13:28
 * @LastEditors: chuhongguang
-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>测试</title>
</head>
<body>
  <button id="btn">懒加载按钮</button>
</body>
</html>